/*******************************************************************************
 * Copyright (c) 2012-2017 Codenvy, S.A.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *   Codenvy, S.A. - initial API and implementation
 *******************************************************************************/
package org.eclipse.che.plugin.jdb.ide.configuration;

import com.google.gwt.core.client.GWT;
import com.google.gwt.event.dom.client.ChangeEvent;
import com.google.gwt.event.dom.client.KeyUpEvent;
import com.google.gwt.event.logical.shared.ValueChangeEvent;
import com.google.gwt.event.logical.shared.ValueChangeHandler;
import com.google.gwt.uibinder.client.UiBinder;
import com.google.gwt.uibinder.client.UiField;
import com.google.gwt.uibinder.client.UiHandler;
import com.google.gwt.user.client.ui.CheckBox;
import com.google.gwt.user.client.ui.FlowPanel;
import com.google.gwt.user.client.ui.TextBox;
import com.google.gwt.user.client.ui.Widget;

import org.eclipse.che.ide.ui.listbox.CustomComboBox;
import org.eclipse.che.ide.util.Pair;

import javax.validation.constraints.NotNull;
import java.util.ArrayList;
import java.util.List;

/**
 * The implementation of {@link JavaDebugConfigurationPageView}.
 *
 * @author Artem Zatsarynnyi
 */
public class JavaDebugConfigurationPageViewImpl implements JavaDebugConfigurationPageView {

    private static final JavaDebugConfigurationPageViewImplUiBinder UI_BINDER =
            GWT.create(JavaDebugConfigurationPageViewImplUiBinder.class);

    private final FlowPanel rootElement;

    @UiField
    CheckBox       devHost;
    @UiField
    TextBox        host;
    @UiField
    CustomComboBox port;

    private ActionDelegate             delegate;
    private List<Pair<String, String>> ports;

    public JavaDebugConfigurationPageViewImpl() {
        rootElement = UI_BINDER.createAndBindUi(this);
        ports = new ArrayList<>();

        devHost.addValueChangeHandler(new ValueChangeHandler<Boolean>() {
            @Override
            public void onValueChange(ValueChangeEvent<Boolean> event) {
                delegate.onDevHostChanged(event.getValue());
            }
        });

        updateDialog();
    }

    @Override
    public void setDelegate(ActionDelegate delegate) {
        this.delegate = delegate;
    }

    @Override
    public Widget asWidget() {
        return rootElement;
    }

    @Override
    public String getHost() {
        return host.getValue();
    }

    @Override
    public void setHost(String host) {
        this.host.setValue(host);
    }

    @Override
    public int getPort() {
        String port = this.port.getValue().trim();
        if (port.isEmpty()) {
            return 0;
        }

        try {
            return Integer.valueOf(port);
        } catch (NumberFormatException e) {
            return 0;
        }
    }

    @Override
    public void setPort(int port) {
        this.port.setValue(port <= 0 ? "" : String.valueOf(port));
    }

    @Override
    public void setHostEnableState(boolean enable) {
        host.setEnabled(enable);
    }

    @Override
    public void setPortsList(@NotNull List<Pair<String, String>> ports) {
        this.ports = ports;
        updatePortsList();
    }

    @Override
    public void setDevHost(boolean value) {
        devHost.setValue(value, true);
    }

    private void updatePortsList() {
        port.clear();
        for (Pair<String, String> entry : ports) {
            port.addItem(entry.first, entry.second);
        }
    }

    private void updateDialog() {
        boolean connectToDevMachine = devHost.getValue();
        if (connectToDevMachine) {
            updatePortsList();
            port.setFocus(true);
        } else {
            host.selectAll();
            host.setFocus(true);
            port.clear();
        }
    }

    @UiHandler({"host"})
    void onHostKeyUp(KeyUpEvent event) {
        delegate.onHostChanged();
    }

    @UiHandler({"port"})
    void onPortKeyUp(KeyUpEvent event) {
        delegate.onPortChanged();
    }

    @UiHandler({"port"})
    void onPortChanged(ChangeEvent event) {
        delegate.onPortChanged();
    }

    interface JavaDebugConfigurationPageViewImplUiBinder extends UiBinder<FlowPanel, JavaDebugConfigurationPageViewImpl> {
    }
}
